University letter so students:
1.
http://blogs.berkeley.edu/2010/08/24/a-letter-to-my-students/
2.
http://www.se.edu/general-education/letter-to-students/
3.
http://homepages.se.edu/gus/general-education-degree-program/letter-to-students/

These are good examples of letters to students because they draw in their attention. The letters then bring the topic of what is important which they very well explain in a simple, easy to understand way. The letters then conclude on a happy note. Students are used to reading letters from friends and family, so reading letters is easy for students to do.

My letter to students:
Dear University Students,
Attending college is a fun and exciting experience. There are so many activities to participate in, clubs, sports teams, and organizations to join, and new friends to socialize with. There are also assigned classes that you should attend. Figuring out how to divide your time may be difficult. You may find it difficult to fit all your activities into one single day. You may also find you do not have time to participate in every activity you want to. Deciding what activities you want to participate in each day should be an act of priorities. Decide what is first on your priority list, and schedule those activities first. Then, figure out what is second most important and schedule those activities into your life. And so on. If you find some activities are conflicting, you might have to choose one of the two. If you can't make it to every single one of your club's meeting, it will not be the end of the world. Just remember, without good grades, you will not stay here and your college schedule will no longer be important. Find a way to fit class, class work, and social activities into your life without conflicts of time. If you need help prioritizing your time talk to upper classman or professors.
Good luck!